[llvm] Fix gcc 7.5 incompatibility in GlobPattern.cpp (PR #66155)

[Fangrui Song via llvm-commits]

MaskRay wrote:

> (Yes, gcc7.5 is probably getting a bit long in the tooth here, and we're looking to upgrade; unfortunately, we are temporarily hamstrung by some ancient build infrastructure that is essentially incapable of being easily upgraded to newer builds, and it will take us a little time to figure out good replacements, unfortunately.)

https://llvm.org/docs/GettingStarted.html#host-c-toolchain-both-compiler-and-standard-library says that GCC 7.4 needs to be supported, so "gcc7.5 is probably getting a bit long in the tooth here" is not a problem.

However, a gcc 7.4 build on x86-64 works for me. I wonder whether this is a 32-bit specific problem or AArch32 GCC specific problem.

https://github.com/llvm/llvm-project/pull/66155