fix unit tests (#908)

test/unit-modcc/test_parser.cpp

@@ -255,7 +255,7 @@ TEST(Parser, parse_if) {
     }
 
     EXPECT_TRUE(check_parse(s, &Parser::parse_if,
-        "   if(abs(a-b)) {      \n"
+        "   if(fabs(a-b)) {      \n"
         "       a = 2+b    \n"
         "   } else if(b>a){\n"
         "       a = 2+b    \n"

test/unit-modcc/test_printers.cpp

@@ -70,7 +70,7 @@ TEST(scalar_printer, statement) {
         {"z=a-(b+c)",        "z=a-(b+c)"},
         {"z=(a>0)<(b>0)",    "z=a>0.<(b>0.)"},
         {"z=a- -2",          "z=a- -2"},
-        {"z=abs(x-z)",       "z=fabs(x-z)"},
+        {"z=fabs(x-z)",      "z=abs(x-z)"},
         {"z=min(x,y)",       "z=min(x,y)"},
         {"z=min(max(a,b),y)","z=min(max(a,b),y)"},
     };