Change to UNIT_TEST_ONLY.

Author: lntue

libc/test/src/__support/File/CMakeLists.txt

@@ -7,14 +7,14 @@ endif()
 
 # TODO: Investigate the precommit bots' failures of this test and re-enable it.
 # https://github.com/llvm/llvm-project/issues/128185.
-set(file_test_hermetic_only "")
+set(file_test_unit_only "")
 if(LIBC_TARGET_OS_IS_LINUX AND LLVM_LIBC_FULL_BUILD)
-  set(file_test_hermetic_only "HERMETIC_TEST_ONLY")
+  set(file_test_unit_only "UNIT_TEST_ONLY")
 endif()
 
 add_libc_test(
   file_test
-  ${file_test_hermetic_only}
+  ${file_test_unit_only}
   SUITE
     libc-support-tests
   SRCS
@@ -31,7 +31,7 @@ add_libc_test(
 
 add_libc_test(
   platform_file_test
-  ${file_test_hermetic_only}
+  ${file_test_unit_only}
   SUITE
     libc-support-tests
   SRCS