add more build tests to travis

.travis.yml

@@ -9,9 +9,20 @@ before_install:
 install:
   - sudo apt-get install -y build-essential gcc-multilib gcc-arm-embedded
 
-before_script:
-  - make build_unix TREZORUI_NOUI=1
-  - make build_stmhal
-
 script:
+  - make build_cross
+
+  - make build_bootloader
+  - make clean_stmhal
+
+  - make build_stmhal
+  - make clean_stmhal
+
+  - make build_stmhal_frozen
+
+  - make build_unix_frozen TREZORUI_NOUI=1
+  - make clean_unix
+
+  - make build_unix TREZORUI_NOUI=1
+
   - make test