Revert to using shell to find files instead of 'find', that wasn't portable.

- I think I did this commit sequence before. :)


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@75420 91177308-0d34-0410-b5e6-96231b3b80d8

test/Makefile

@@ -1,9 +1,8 @@
 LEVEL = ../../..
 include $(LEVEL)/Makefile.common
 
-# Test in all immediate subdirectories if unset (except for the .svn and Output
-# directories).
-TESTDIRS ?= $(shell find $(PROJ_SRC_DIR) -depth 1 -type d -not -name .svn -prune -and -not -name Output -prune)
+# Test in all immediate subdirectories if unset.
+TESTDIRS ?= $(shell echo $(PROJ_SRC_DIR)/*/)
 
 ifndef TESTARGS
 ifdef VERBOSE