Minor fixes in Travis CI tests (#262)

chmod command should be executed before any other script in the travis directory

.travis.yml

@@ -57,10 +57,8 @@ matrix:
 #         osx_image: xcode9.2
 
 before_install:
-  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then travis/linux_before_install.sh; fi
-
-before_script:
   - chmod +x travis/*.sh
+  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then travis/linux_before_install.sh; fi
 
 install:
   - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then travis/linux_install.sh; fi

travis/linux_script.sh

@@ -83,10 +83,10 @@ if [[ "${DIST}" == "trusty" ]]; then
 	cp \
 		/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.so \
 		"${APPIMAGE_DST_PATH}"/appdir/usr/plugins/platforminputcontexts/
-    cd "${APPIMAGE_DST_PATH}"/appdir/usr/bin
+	cd "${APPIMAGE_DST_PATH}"/appdir/usr/bin
 	ln -sf ../plugins/platforms/ .   # An unknown bug
 	ln -sf ../share/flameshot/translations/ . # add translation soft link 
-    cd "${project_dir}"
+	cd "${project_dir}"
 
 	# -verbose=2
 	./linuxdeployqt "${APPIMAGE_DST_PATH}"/appdir/usr/share/applications/flameshot.desktop -appimage