fix: unexpected_cfgs (#49)

Author: Nugine

crates/base32-simd/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-check-cfg=cfg(vsimd_dump_symbols)")
+}

crates/base64-simd/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-check-cfg=cfg(vsimd_dump_symbols)")
+}

crates/hex-simd/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-check-cfg=cfg(vsimd_dump_symbols)")
+}

crates/unicode-simd/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-check-cfg=cfg(vsimd_dump_symbols)")
+}

crates/uuid-simd/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-check-cfg=cfg(vsimd_dump_symbols)")
+}