Remove spaces in tidy check list.

This will allow spaces in LOCAL_TIDY_CHECKS.

Bug: http://b/27779618
Change-Id: I6f9b133220e49b2581a06d2fd9083a1d6b7badca
Test: build with WITH_TIDY=1.

core/binary.mk

@@ -1601,6 +1601,8 @@ ifneq (,$(filter 1 true,$(my_tidy_enabled)))
   endif
 endif
 
+my_tidy_checks := $(subst $(space),,$(my_tidy_checks))
+
 # Move -l* entries from ldflags to ldlibs, and everything else to ldflags
 my_ldlib_flags := $(my_ldflags) $(my_ldlibs)
 my_ldlibs := $(filter -l%,$(my_ldlib_flags))