[sanitizer] Skip test on Android where chmod is not working

Third attempt to fix a bot failure from
634da7a on an Android bot:
https://lab.llvm.org/buildbot#builders/77/builds/14339

My last attempt used an approach from another test where chmod was not
working of using a bad character in the path name. But it looks like
this trick only works on Windows.

Instead, restore the original version of this test before my change at
634da7a and move the bad path test to
a new test file, marking it unsupported on Android.

Author: teresajohnson

compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_bad_report_path_test.cpp

@@ -0,0 +1,27 @@
+// Test __sanitizer_set_report_path and __sanitizer_get_report_path with an
+// unwritable directory.
+// RUN: rm -rf %t.report_path && mkdir -p %t.report_path
+// RUN: chmod u-w %t.report_path || true
+// RUN: %clangxx -O2 %s -o %t
+// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=FAIL
+
+// The chmod is not working on the android bot for some reason.
+// UNSUPPORTED: android
+
+#include <assert.h>
+#include <sanitizer/common_interface_defs.h>
+#include <stdio.h>
+#include <string.h>
+
+volatile int *null = 0;
+
+int main(int argc, char **argv) {
+  char buff[1000];
+  sprintf(buff, "%s.report_path/report", argv[0]);
+  __sanitizer_set_report_path(buff);
+  assert(strncmp(buff, __sanitizer_get_report_path(), strlen(buff)) == 0);
+  printf("Path %s\n", __sanitizer_get_report_path());
+}
+
+// FAIL: ERROR: Can't open file: {{.*}}Posix/Output/sanitizer_bad_report_path_test.cpp.tmp.report_path/report.
+// FAIL-NOT: Path {{.*}}Posix/Output/sanitizer_bad_report_path_test.cpp.tmp.report_path/report.

compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_path_test.cpp

@@ -1,9 +1,6 @@
 // Test __sanitizer_set_report_path and __sanitizer_get_report_path:
 // RUN: %clangxx -O2 %s -o %t
-// Create a directory without write access.
-// RUN: rm -rf %t.baddir && mkdir -p %t.baddir
-// RUN: chmod u-w %t.baddir || true
-// RUN: not %run %t 2>&1 | FileCheck %s
+// RUN: %run %t | FileCheck %s
 
 #include <assert.h>
 #include <sanitizer/common_interface_defs.h>
@@ -18,17 +15,6 @@ int main(int argc, char **argv) {
   __sanitizer_set_report_path(buff);
   assert(strncmp(buff, __sanitizer_get_report_path(), strlen(buff)) == 0);
   printf("Path %s\n", __sanitizer_get_report_path());
-  fflush(stdout);
-
-  // Try setting again with an invalid/inaccessible directory.
-  // Use invalid characters in directory name in case chmod doesn't work as
-  // intended.
-  sprintf(buff, "%s.baddir/?bad?/report", argv[0]);
-  __sanitizer_set_report_path(buff);
-  assert(strncmp(buff, __sanitizer_get_report_path(), strlen(buff)) == 0);
-  printf("Path %s\n", __sanitizer_get_report_path());
 }
 
 // CHECK: Path {{.*}}Posix/Output/sanitizer_set_report_path_test.cpp.tmp.report_path/report.
-// CHECK: ERROR: Can't create directory: {{.*}}Posix/Output/sanitizer_set_report_path_test.cpp.tmp.baddir
-// CHECK-NOT: Path {{.*}}Posix/Output/sanitizer_set_report_path_test.cpp.tmp.baddir