added lib to make file

Former-commit-id: 470d970839f30bb346672afa210d3e60eace8d34

Makefile

@@ -68,6 +68,7 @@ obj:
 	mkdir -p obj
 
 lib/libigl.a: $(OBJ_FILES)
+	mkdir -p lib
 	rm -f $@
 	ar cqs $@ $(OBJ_FILES)
 

Makefile.conf

@@ -27,7 +27,7 @@ ifeq ($(IGL_USERNAME),ajx)
 	IGL_WITH_MOSEK=1
 endif
 
-ifeq ($(IGL_USERNAME),jalec)
+ifeq ($(IGL_USERNAME),jalec_linux) 
 	MOSEKPLATFORM=linux64x86
 	IGL_WITH_TETGEN=1
 	IGL_WITH_MATLAB=0