Allow a relativ path to the NaCl SDK when building.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/16092004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Makefile.nacl

@@ -46,7 +46,7 @@ else
   endif
 endif
 
-TOOLCHAIN_PATH = ${NACL_SDK_ROOT}/toolchain
+TOOLCHAIN_PATH = $(realpath ${NACL_SDK_ROOT}/toolchain)
 NACL_TOOLCHAIN ?= ${TOOLCHAIN_PATH}/${TOOLCHAIN_DIR}
 
 ifeq ($(ARCH), nacl_ia32)