Always make a clean build.

None clean builds caused issues with compiles and serialization of types
from disk cache.

Change-Id: Ia9a21ac83adc7399446367d086182263b0705f6f
diff --git a/benchmarks/src/main/scripts/buildSDK b/benchmarks/src/main/scripts/buildSDK
index 22080ee..f51c094 100755
--- a/benchmarks/src/main/scripts/buildSDK
+++ b/benchmarks/src/main/scripts/buildSDK
@@ -9,4 +9,5 @@
 SOURCE_LOCATION=${1}
 
 cd ${SOURCE_LOCATION}
+ant clean
 ant dist-dev
\ No newline at end of file