vec: some useful functions (#103)

These functions are added:
- abs(): absolute value
- fract(): fractional part
- norm_one(): L1 norm
- norm_inf(): infinity norm
- hadd(): horizontal add
- hmax(): horizontal max

src/vec4.c

@@ -74,6 +74,18 @@ glmc_vec4_norm2(vec4 v) {
   return glm_vec4_norm2(v);
 }
 
+CGLM_EXPORT
+float
+glmc_vec4_norm_one(vec4 v) {
+  return glm_vec4_norm_one(v);
+}
+
+CGLM_EXPORT
+float
+glmc_vec4_norm_inf(vec4 v) {
+  return glm_vec4_norm_inf(v);
+}
+
 CGLM_EXPORT
 void
 glmc_vec4_add(vec4 a, vec4 b, vec4 dest) {
@@ -346,6 +358,24 @@ glmc_vec4_sign(vec4 v, vec4 dest) {
   glm_vec4_sign(v, dest);
 }
 
+CGLM_EXPORT
+void
+glmc_vec4_abs(vec4 v, vec4 dest) {
+  glm_vec4_abs(v, dest);
+}
+
+CGLM_EXPORT
+void
+glmc_vec4_fract(vec4 v, vec4 dest) {
+  glm_vec4_fract(v, dest);
+}
+
+CGLM_EXPORT
+float
+glmc_vec4_hadd(vec4 v) {
+  return glm_vec4_hadd(v);
+}
+
 CGLM_EXPORT
 void
 glmc_vec4_sqrt(vec4 v, vec4 dest) {