vlib/math: Add a pure V backend for vlib/math (#11267)

vlib/math/sqrt.c.v

@@ -0,0 +1,17 @@
+module math
+
+fn C.sqrt(x f64) f64
+
+fn C.sqrtf(x f32) f32
+
+// sqrt calculates square-root of the provided value.
+[inline]
+pub fn sqrt(a f64) f64 {
+	return C.sqrt(a)
+}
+
+// sqrtf calculates square-root of the provided value. (float32)
+[inline]
+pub fn sqrtf(a f32) f32 {
+	return C.sqrtf(a)
+}