remove duplicate code

src/openal.mk

@@ -20,20 +20,7 @@ endef
 define $(PKG)_BUILD
     cd '$(1)/build' && cmake .. \
         -DCMAKE_TOOLCHAIN_FILE='$(CMAKE_TOOLCHAIN_FILE)' \
-        -DLIBTYPE=STATIC \
-        -DEXAMPLES=FALSE
-    $(MAKE) -C '$(1)/build' -j '$(JOBS)' install
-
-    '$(TARGET)-gcc' \
-        -W -Wall -Werror -ansi -pedantic \
-        '$(2).c' -o '$(PREFIX)/$(TARGET)/bin/test-openal.exe' \
-        `'$(TARGET)-pkg-config' openal --cflags --libs`
-endef
-
-define $(PKG)_BUILD_SHARED
-    cd '$(1)/build' && cmake .. \
-        -DCMAKE_TOOLCHAIN_FILE='$(CMAKE_TOOLCHAIN_FILE)' \
-        -DLIBTYPE=SHARED \
+        -DLIBTYPE=$(if BUILD_SHARED,SHARED,STATIC) \
         -DEXAMPLES=FALSE
     $(MAKE) -C '$(1)/build' -j '$(JOBS)' install