Rename DebugMake variable to DEBUGMAKE for consistency (variables that are designed to be overridden), and use VERBOSE=1 instead of VERBOSE!="" for controlling verbosity.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@93712 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/make/config.mk b/make/config.mk
index f0663aa..4851191 100644
--- a/make/config.mk
+++ b/make/config.mk
@@ -65,11 +65,14 @@
 LIPO := lipo
 CP := cp
 
+VERBOSE := 0
+DEBUGMAKE := 0
+
 ###
 # Automatic and derived variables.
 
 # Adjust settings for verbose mode
-ifndef VERBOSE
+ifneq ($(VERBOSE),1)
   Verb := @
 else
   Verb :=