Enforce all the source files to be encoded in UTF-8.

third_party/libxml/src/testapi.c

Index: third_party/libxml/src/testapi.c
diff --git a/third_party/libxml/src/testapi.c b/third_party/libxml/src/testapi.c
index da6ce1bcd1c06920911d77317251836c6f1491cd..d046cbc4e7dee25ed82a08002ca10edda98aa0d3 100644
--- a/third_party/libxml/src/testapi.c
+++ b/third_party/libxml/src/testapi.c
@@ -291,7 +291,7 @@ static void des_long(int no ATTRIBUTE_UNUSED, long val ATTRIBUTE_UNUSED, int nr
 static xmlChar gen_xmlChar(int no, int nr ATTRIBUTE_UNUSED) {
     if (no == 0) return('a');
     if (no == 1) return(' ');
-    if (no == 2) return((xmlChar) 'ø');
+    if (no == 2) return((xmlChar) 'ø');
     return(0);
 }
 
@@ -399,7 +399,7 @@ static void des_debug_FILE_ptr(int no ATTRIBUTE_UNUSED, FILE *val, int nr ATTRIB
 static xmlChar *gen_const_xmlChar_ptr(int no, int nr ATTRIBUTE_UNUSED) {
     if (no == 0) return((xmlChar *) "foo");
     if (no == 1) return((xmlChar *) "<foo/>");
-    if (no == 2) return((xmlChar *) "nøne");
+    if (no == 2) return((xmlChar *) "nøne");
     if (no == 3) return((xmlChar *) " 2ab ");
     return(NULL);
 }