Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/bitflags-1.3.2/tests/compile-pass/repr/c.rs

@@ -0,0 +1,10 @@
+use bitflags::bitflags;
+
+bitflags! {
+    #[repr(C)]
+    struct Flags: u32 {
+        const A = 0b00000001;
+    }
+}
+
+fn main() {}

vendor/bitflags-1.3.2/tests/compile-pass/repr/transparent.rs

@@ -0,0 +1,10 @@
+use bitflags::bitflags;
+
+bitflags! {
+    #[repr(transparent)]
+    struct Flags: u32 {
+        const A = 0b00000001;
+    }
+}
+
+fn main() {}