Switch back to vendored libbpf, as the system one is too old

Signed-off-by: Michel Alexandre Salim <salimma@fedoraproject.org>

libbpf-sys-fix-metadata.diff

@@ -18,11 +18,3 @@
  optional = true
  
  [build-dependencies.cc]
-@@ -48,6 +48,7 @@
- version = "0.3"
- 
- [features]
-+default = ["novendor"]
- novendor = []
- static = []
- 

rust-libbpf-sys.spec

@@ -15,12 +15,14 @@ URL:            https://crates.io/crates/libbpf-sys
 Source:         %{crates_source %{crate} %{upstream_version}}
 # Manually created patch for downstream crate metadata changes
 # * remove version suffix from crate version
-# * default to novendor
 # * bump bindgen to 0.63
 Patch:          libbpf-sys-fix-metadata.diff
 
 BuildRequires:  rust-packaging >= 21
 
+# the system libbpf is too old, use the bundled copy
+Provides:       bundled(libbpf) = 1.0.1
+
 %global _description %{expand:
 Rust bindings to libbpf from the Linux kernel.}
 
@@ -94,15 +96,12 @@ use the "static" feature of the "%{crate}" crate.
 
 %prep
 %autosetup -n %{crate}-%{upstream_version} -p1
-# Remove bundled libbpf
-rm -r libbpf
 %cargo_prep
 
 %generate_buildrequires
 %cargo_generate_buildrequires
 echo 'elfutils-libelf-devel'
 echo 'kernel-headers'
-echo 'libbpf-devel'
 echo 'zlib-devel'
 
 %build