Add static to inline statement

Just inline meant the symbol did not get compiled so we got an undefined reference error

src/stackwalk.c

@@ -789,7 +789,7 @@ _os_tsd_get_direct(unsigned long slot)
 // Unconditionally defined ptrauth_strip (instead of using the ptrauth.h header)
 // since libsystem will likely be compiled with -mbranch-protection, and we currently are not.
 // code from https://github.com/llvm/llvm-project/blob/7714e0317520207572168388f22012dd9e152e9e/compiler-rt/lib/sanitizer_common/sanitizer_ptrauth.h
-inline uint64_t ptrauth_strip(uint64_t __value, unsigned int __key) {
+static inline uint64_t ptrauth_strip(uint64_t __value, unsigned int __key) {
  // On the stack the link register is protected with Pointer
  // Authentication Code when compiled with -mbranch-protection.
  // Let's strip the PAC unconditionally because xpaclri is in the NOP space,