libc: Add strcoll()

No locale support, this just calls strcmp()

libs/libc/include/string.h

@@ -71,6 +71,9 @@ extern "C"
     /* Compares at most max bytes of the strings a and b. */
     int strncmp(const char* a, const char* b, size_t max);
 
+    /* Compares a and b based on the current locale. */
+    int strcoll(const char* a, const char* b);
+
     /* Searches for the needle string in the haystack string. */
     char* strstr(const char* haystack, const char* needle);
 

libs/libc/src/string.cpp

@@ -131,6 +131,11 @@ extern "C"
         return *(const unsigned char*)a - *(const unsigned char*)b;
     }
 
+    int strcoll(const char* a, const char* b)
+    {
+        return strcmp(a, b);
+    }
+
     size_t strcspn(const char* str, const char* reject)
     {
         const char* s = str;