Travis: move libgap job into "testspecial test-compile" job

In a sample run of the libgap job that took 222 seconds (3 mins 42 secs), just
11 seconds were spent on the test, the rest on downloading and compiling
stuff, handling coverage etc.

That job spends just 11 seconds on testing, and the remaining

Author: fingolfin

.travis.yml

@@ -122,11 +122,8 @@ matrix:
           #- libgmp-dev:i386    # do not install GMP, to test that GAP can build its own
           - libreadline-dev:i386
 
-    # test error reporting and compiling
-    - env: TEST_SUITES="testspecial test-compile"
-
-    # test libgap
-    - env: TEST_SUITES="testlibgap"
+    # test error reporting and compiling as well as libgap
+    - env: TEST_SUITES="testspecial test-compile testlibgap"
 
 script:
   - set -e

etc/ci.sh

@@ -28,6 +28,9 @@ mkdir -p $COVDIR
 
 for TEST_SUITE in $TEST_SUITES
 do
+  # restore current directory before each test suite
+  cd "$BUILDDIR"
+
   case $TEST_SUITE in
   testspecial | test-compile)
     cd $SRCDIR/tst/$TEST_SUITE