[modules][test] Bump maximum size for embed-files-compressed.cpp for the sake of RISC-V (#111360)

The size of a.pcm produced by an RV64 clang running natively is 67416
bytes, causing this test to fail. Bump up the maximum size. The test
still retains its original intent as far as I can see, as it's really
trying to ensure that compressing kicks in and reduces the
multi-megabyte input.

Author: asb

clang/test/Modules/embed-files-compressed.cpp

@@ -17,7 +17,7 @@
 // RUN: %clang_cc1 -fmodules -I%t -fmodules-cache-path=%t -fmodule-name=a -emit-module %t/modulemap -fmodules-embed-all-files -o %t/a.pcm
 //
 // The above embeds ~4.5MB of highly-predictable /s and \ns into the pcm file.
-// Check that the resulting file is under 60KB:
+// Check that the resulting file is under 80KB:
 //
 // RUN: wc -c %t/a.pcm | FileCheck --check-prefix=CHECK-SIZE %s
-// CHECK-SIZE: {{(^|[^0-9])[1-5][0-9][0-9][0-9][0-9]($|[^0-9])}}
+// CHECK-SIZE: {{(^|[^0-9])[1-7][0-9][0-9][0-9][0-9]($|[^0-9])}}