Disable parallel make for gaia in more build environments

Follow-up to d1a68153, some environments use the relative path
from the workspace root to profile.tar.gz.

Change-Id: I99d3ebde672d4681d7eab2e99137bcd72e34c1fd

b2g_product.mk

@@ -58,6 +58,7 @@ endif
 # is a symbolic link in the path to the build root.
 #
 %/gaia/profile.tar.gz: MAKE:=$(MAKE) -j1
+gaia/profile.tar.gz: MAKE:=$(MAKE) -j1
 
 
 export B2G_DEBUG