[OpenMP] Only use #pragma comment(lib, ...) in MSVC build configurations

MinGW build configurations don't support this pragma (unless
compiling with clang, with -fms-extensions, and linking with
lld), and at least clang warns about it.

This library does end up linked by the cmake files anyway (as
long as the check works properly).

Differential Revision: https://reviews.llvm.org/D96581

GitOrigin-RevId: 3f9519b768ebe7a2731443bdc2d3178a005e8d7f
diff --git a/runtime/src/z_Windows_NT_util.cpp b/runtime/src/z_Windows_NT_util.cpp
index 7a22df0..2e9484b 100644
--- a/runtime/src/z_Windows_NT_util.cpp
+++ b/runtime/src/z_Windows_NT_util.cpp
@@ -24,7 +24,9 @@
 #include <ntsecapi.h> // UNICODE_STRING
 #include <ntstatus.h>
 #include <psapi.h>
+#ifdef _MSC_VER
 #pragma comment(lib, "psapi.lib")
+#endif
 
 enum SYSTEM_INFORMATION_CLASS {
   SystemProcessInformation = 5