[clang] [CMake][Fuchsia] Use escaped double quote (PR #99246)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/1762

Here is the relevant piece of the build log for the reference:
```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Analysis/StructuralHash/structural-hash-printer.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/opt -passes='print<structural-hash>' -disable-output /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/opt '-passes=print<structural-hash>' -disable-output /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll
RUN: at line 2: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/opt -passes='print<structural-hash><detailed>' -disable-output /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll 2>&1 | /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll -check-prefix=DETAILED-HASH
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/opt '-passes=print<structural-hash><detailed>' -disable-output /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll -check-prefix=DETAILED-HASH
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll:22:23: error: DETAILED-HASH-NEXT: expected string not found in input
; DETAILED-HASH-NEXT: Function f1 Hash: [[DF1H:([a-z0-9]{14,})]]
                      ^
<stdin>:1:30: note: scanning from here
Module Hash: 75ca0bc110652c75
                             ^
<stdin>:2:1: note: possible intended match here
Function f1 Hash: 75452f6dda947
^

Input file: <stdin>
Check file: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/test/Analysis/StructuralHash/structural-hash-printer.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: Module Hash: 75ca0bc110652c75 
check:21      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
next:22'0                                  X error: no match found
           2: Function f1 Hash: 75452f6dda947 
next:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
next:22'1     ?                                possible intended match
           3: Function f2 Hash: af0a1e3f24a2cd30 
next:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>>>

--

********************


```

https://github.com/llvm/llvm-project/pull/99246