src/*.bash: remove some trailing whitespace

Change-Id: I11793daafdb69156b1dafaa80fe501fcaeeff202
Reviewed-on: https://go-review.googlesource.com/111435
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: Zhou Peng

src/make.bash

@@ -41,7 +41,7 @@
 # This is used by cgo.  Default is CC.
 #
 # CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
-# This is used by cgo. Default is CXX, or, if that is not set, 
+# This is used by cgo. Default is CXX, or, if that is not set,
 # "g++" or "clang++".
 #
 # FC: Command line to run to compile Fortran code for GOARCH.

src/race.bash

@@ -18,7 +18,7 @@ case $(uname) in
 	# why Apple? why?
 	if sysctl machdep.cpu.extfeatures | grep -qv EM64T; then
 		usage
-	fi 
+	fi
 	;;
 "Linux")
 	if [ $(uname -m) != "x86_64" ]; then