Travis config: use correct env variable to enable coveralls.

.travis.yml

@@ -20,10 +20,10 @@ env:
   global:
     - PV=r8e PLATF=linux-x86_64 NDK_HOME=${TRAVIS_BUILD_DIR}/android-ndk-${PV} PATH=${PATH}:${NDK_HOME}
   matrix:
-    - LINUX=1 TRAVIS_NO_EXPORT=YES ASSIMP_COVERALLS=ON
-    - LINUX=1 TRAVIS_NO_EXPORT=NO  ASSIMP_COVERALLS=OFF
-    - LINUX=1 SHARED_BUILD=ON      ASSIMP_COVERALLS=OFF
-    - LINUX=1 SHARED_BUILD=OFF     ASSIMP_COVERALLS=OFF
+    - LINUX=1 TRAVIS_NO_EXPORT=YES ENABLE_COVERALLS=ON
+    - LINUX=1 TRAVIS_NO_EXPORT=NO  ENABLE_COVERALLS=OFF
+    - LINUX=1 SHARED_BUILD=ON      ENABLE_COVERALLS=OFF
+    - LINUX=1 SHARED_BUILD=OFF     ENABLE_COVERALLS=OFF
     - ANDROID=1
 
 language: cpp