Fix typo

.drone.yml

@@ -5,7 +5,7 @@ name: build-linux
 platform:
   arch: amd64
 
-#environment:
+environment:
   MYCC: gcc
   #SHARED: "-f makefile.shared"
 
@@ -23,7 +23,8 @@ steps:
       path: /tmp/cache
 
   commands:
-    - export CC=${{MYCC}}
+#    - export CC=gcc
+    - export CC=${MYCC}
     - make -f makefile.shared test_standalone >test_gcc_1.txt 2>test_gcc_2.txt
     - ./test >test_std.txt 2>test_err.txt"