Reduced ieee754 parser size (#4154)

Co-authored-by: hedger <hedger@users.noreply.github.com>

lib/ieee754_parse_wrap/wrappers.c

@@ -0,0 +1,14 @@
+#include "wrappers.h"
+
+// Based on the disassembly, providing NULL as `locale` is fine.
+// The default `strtof` and `strtod` provided in the same libc_nano also just
+// call these functions, but with an actual locale structure which was taking up
+// lots of .data space (364 bytes).
+
+float __wrap_strtof(const char* in, char** tail) {
+    return strtof_l(in, tail, NULL);
+}
+
+double __wrap_strtod(const char* in, char** tail) {
+    return strtod_l(in, tail, NULL);
+}