[ci] Test plain builds instead of ccache

We weren't getting a lot of ROI out of testing ccache vs. non-ccache
builds, i.e. I have never seen a ccache/non-ccache build pair have
different behaviors.

Much better to test a "plain" parrot compile for each compiler, which
means we turn off every possible Configure.pl flag. This tends to catch
test failures where tests have not been properly skipped if Parrot was
not compiled with the feature turned on.

This has the added benefit of using fewer resources on Travis CI and
running faster.

.travis.yml

@@ -9,7 +9,7 @@ before_script:
     - sudo chown -R $CI_USER ~/perl5
 # No, we are not going to run the tests for all these dependencies on every commit
     - cpanm -n TAP::Harness::Archive TAP::Harness::ReportByDescription
-script: "perl Configure.pl --test=build $PARROT_OPTIMIZE --cc=\"$CC\" --link=\"$CC\" --ld=\"$CC\" --ccflags='-g' ; make $PARROT_TEST"
+script: "perl Configure.pl --test=build $PARROT_CONFIG_ARGS $PARROT_OPTIMIZE --cc=\"$CC\" --link=\"$CC\" --ld=\"$CC\" --ccflags='-g' ; make $PARROT_TEST"
 # branches:
 #   only:
 #     - master
@@ -20,13 +20,12 @@ notifications:
     on_success: change
     on_failure: always
 env:
-    - PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="clang"
-    - PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="clang"
-    - PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="ccache gcc"
-    - PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="ccache g++"
-    - PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="gcc"
-    - PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="g++"
-    - PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="ccache gcc"
-    - PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="ccache g++"
-    - PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="gcc"
-    - PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="g++"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="clang"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="clang"
+    - PARROT_CONFIG_ARGS="--without-gettext --without-gmp --without-libffi --without-extra-nci-thunks --without-opengl --without-readline --without-pcre --without-zlib --without-threads --without-icu" PARROT_OPTIMIZE="" PARROT_TEST="smolder_fulltest" CC="clang"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="gcc"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="gcc"
+    - PARROT_CONFIG_ARGS="--without-gettext --without-gmp --without-libffi --without-extra-nci-thunks --without-opengl --without-readline --without-pcre --without-zlib --without-threads --without-icu" PARROT_OPTIMIZE="" PARROT_TEST="smolder_fulltest" CC="gcc"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE="--optimize" PARROT_TEST="smolder_fulltest" CC="g++"
+    - PARROT_CONFIG_ARGS="" PARROT_OPTIMIZE=""           PARROT_TEST="smolder_fulltest" CC="g++"
+    - PARROT_CONFIG_ARGS="--without-gettext --without-gmp --without-libffi --without-extra-nci-thunks --without-opengl --without-readline --without-pcre --without-zlib --without-threads --without-icu" PARROT_OPTIMIZE="" PARROT_TEST="smolder_fulltest" CC="g++"