[CompilerRT][Tests] Fix profile/darwin-proof-of-concept.c (#104237)

Fix profile/darwin-proof-of-concept.c on AppleSilicon Mac where there is
a different page alignment. The previous fix to drop alignment is
actually breaking the tests on Apple Silicon Mac. Revert to the original
section alignment and requires an ARM64 target for this test to run.

Author: cachemeifyoucan

compiler-rt/test/profile/ContinuousSyncMode/darwin-proof-of-concept.c

@@ -4,12 +4,12 @@
 // mode to a new platform, but is not in and of itself a test of the profiling
 // runtime.
 
-// REQUIRES: darwin
+// REQUIRES: darwin, target={{arm64.*}}
 
 // Align counters and data to the maximum expected page size (16K).
 // RUN: %clang -g -o %t %s \
-// RUN:   -Wl,-sectalign,__DATA,__pcnts,0x1000 \
-// RUN:   -Wl,-sectalign,__DATA,__pdata,0x1000
+// RUN:   -Wl,-sectalign,__DATA,__pcnts,0x4000 \
+// RUN:   -Wl,-sectalign,__DATA,__pdata,0x4000
 
 // Create a 'profile' using mmap() and validate it.
 // RUN: %run %t create %t.tmpfile
@@ -24,7 +24,7 @@
 
 __attribute__((section("__DATA,__pcnts"))) int counters[] = {0xbad};
 extern int cnts_start __asm("section$start$__DATA$__pcnts");
-const size_t cnts_len = 0x1000;
+const size_t cnts_len = 0x4000;
 
 __attribute__((section("__DATA,__pdata"))) int data[] = {1, 2, 3};
 extern int data_start __asm("section$start$__DATA$__pdata");
@@ -131,12 +131,12 @@ int main(int argc, char **argv) {
     fprintf(stderr, "__pcnts is not page-aligned: 0x%lx.\n", cnts_start_int);
     return EXIT_FAILURE;
   }
-  if (data_start_int % 0x1000 != 0) {
+  if (data_start_int % 0x4000 != 0) {
     fprintf(stderr, "__pdata is not correctly aligned: 0x%lx.\n",
             data_start_int);
     return EXIT_FAILURE;
   }
-  if (cnts_start_int + 0x1000 != data_start_int) {
+  if (cnts_start_int + 0x4000 != data_start_int) {
     fprintf(stderr, "__pdata not ordered after __pcnts.\n");
     return EXIT_FAILURE;
   }