Make irGen.output_base use full path rather than relative

src/common.cpp

@@ -692,3 +692,12 @@ wchar_t **command_line_to_wargv(wchar_t *cmd_line, int *_argc) {
 	}
 #endif
 
+
+String path_to_full_path(gbAllocator a, String path) {
+	gbAllocator ha = heap_allocator();
+	char *path_c = gb_alloc_str_len(ha, cast(char *)path.text, path.len);
+	defer (gb_free(ha, path_c));
+
+	char *fullpath = gb_path_get_full_name(a, path_c);
+	return make_string_c(fullpath);
+}

src/ir.cpp

@@ -7766,8 +7766,10 @@ bool ir_gen_init(irGen *s, Checker *c) {
 			s->output_base = substring(s->output_name, 0, pos);
 		}
 	}
+	gbAllocator ha = heap_allocator();
+	s->output_base = path_to_full_path(ha, s->output_base);
 
-	gbString output_file_path = gb_string_make_length(heap_allocator(), s->output_base.text, s->output_base.len);
+	gbString output_file_path = gb_string_make_length(ha, s->output_base.text, s->output_base.len);
 	output_file_path = gb_string_appendc(output_file_path, ".ll");
 	defer (gb_string_free(output_file_path));