[llvm] [llvm-objcopy] Add --skip-symbol and --skip-symbols options (PR #80873)

[James Henderson via llvm-commits]

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@@ -0,0 +1,78 @@
+# RUN: yaml2obj %s -o %t.o
+# RUN: echo 'foo[2-3]' > %t.skip.regex
+
+## Check --skip-symbols functionality when changing symbol bindings.
+# RUN: llvm-objcopy %t.o %t1.o --localize-hidden --skip-symbols=%t.skip.regex --regex
+# RUN: llvm-readelf -s %t1.o | FileCheck %s --check-prefix=LH-SYMS
+# LH-SYMS-DAG: LOCAL  HIDDEN      1 foo1
+# LH-SYMS-DAG: GLOBAL HIDDEN      1 foo2
+# LH-SYMS-DAG: GLOBAL HIDDEN      1 foo3
+
+## Check --skip-symbol functionality when changing symbol bindings.
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jh7370 wrote:

Similar to my above comment, I'd swap this around with the previous check, so that the "main" option is tested first. Applies for each of the other pair of cases too.

https://github.com/llvm/llvm-project/pull/80873