update musl libc test to fix "cross" compilation on glibc system #19352
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−7
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The ldd check for musl libc does not correctly detect musl libc in case one is compiling for musl libc on a glibc system. This PR fixes that.
This works because <features.h> will automatically define
__USE_GNUunder glibc to enable GNU extensions, which musl explicitly does not support.