[compiler-rt] Hardcode uptr/sptr typedefs on Linux Arm

After llvm#106155, Android arm32 asan builds stopped working with missing definition linker errors. This is due to inconsistent definitions of `uptr` of either `unsigned long` or `unsigned int` even between TUs in compiler-rt. This is caused by Linux arm32 headers redefining __UINTPTR_TYPE__ (see arch/arm/include/uapi/asm/types.h in the Linux kernel repo), meaning include order/whether or not the Linux header is included changes compiler-rt symbol mangling.

As a workaround, this hardcodes `uptr`/`sptr` in compiler-rt to `unsigned int`/`int` on Linux arm32, matching clang/gcc.

Author: aeubanks

compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h

@@ -139,8 +139,14 @@
 namespace __sanitizer {
 
 #if defined(__UINTPTR_TYPE__)
+#if defined(__arm__) && defined(__linux__)
+// Linux Arm headers redefine __UINTPTR_TYPE__ and disagree with clang/gcc.
+typedef unsigned int uptr;
+typedef int sptr;
+#else
 typedef __UINTPTR_TYPE__ uptr;
 typedef __INTPTR_TYPE__ sptr;
+#endif
 #elif defined(_WIN64)
 // 64-bit Windows uses LLP64 data model.
 typedef unsigned long long uptr;