Rebase Eigen to 3.3.3.

Bug: 34161771
Test: mm and RenderScript BLAS tests pass on bullhead.
Change-Id: Ia448b3202708e395fed9c783ea4323289d69dbef
diff --git a/scripts/buildtests.in b/scripts/buildtests.in
index 7026373..526d5b7 100755
--- a/scripts/buildtests.in
+++ b/scripts/buildtests.in
@@ -2,7 +2,7 @@
 
 if [[ $# != 1 || $1 == *help ]]
 then
-  echo "usage: ./check regexp"
+  echo "usage: $0 regexp"
   echo "  Builds tests matching the regexp."
   echo "  The EIGEN_MAKE_ARGS environment variable allows to pass args to 'make'."
   echo "    For example, to launch 5 concurrent builds, use EIGEN_MAKE_ARGS='-j5'"
@@ -14,9 +14,9 @@
 
 if [ -n "${EIGEN_MAKE_ARGS:+x}" ]
 then
-  make $targets_to_make ${EIGEN_MAKE_ARGS}
+  @CMAKE_MAKE_PROGRAM@ $targets_to_make ${EIGEN_MAKE_ARGS}
 else
-  make $targets_to_make
+  @CMAKE_MAKE_PROGRAM@ $targets_to_make @EIGEN_TEST_BUILD_FLAGS@
 fi
 exit $?