Use patch macro for serde_derive patch

Signed-off-by: Bryan Gurney <[email protected]>

mockbuild_test/stratisd.spec

@@ -14,6 +14,7 @@ Source0:        %{url}/archive/stratisd-v%{version}/%{name}-%{version}.tar.gz
 Source1:        %{url}/releases/download/stratisd-v%{version}/%{name}-%{version}-vendor.tar.gz
 Source2:        %{crates_source}
 
+Patch0:         vendor-serde_derive.patch
 
 ExclusiveArch:  %{rust_arches}
 %if 0%{?rhel}
@@ -87,7 +88,7 @@ Requires:     stratisd
 # Rename SOURCE0's top-level directory because it starts with
 # stratisd-stratisd-v. GitHub calculates the directory name from the repo name
 # + the tag. Extract the upstream crate on top of the extracted GitHub release,
-# overwriting changed files. The primary purpose of thie step is to ensure that
+# overwriting changed files. The primary purpose of this step is to ensure that
 # the Cargo.toml that is used in building is the one that is generated by
 # cargo-publish and cargo-package, not the file with path dependencies that
 # GitHub packs up. Tar the overwritten files back up again into a tar file
@@ -108,7 +109,7 @@ tar --extract --file %{SOURCE1}
 
 # Remove pre-compiled procedural macro, compile from source
 rm ./vendor/serde_derive/serde_derive-x86_64-unknown-linux-gnu
-patch -p1 ./vendor-serde_derive.patch
+%patch0 -p1
 
 # Rezip the tarfile
 tar --create --gzip --file %{SOURCE1}.newfile ./vendor --remove-files