Fix typo in CFI build documentation

Signed-off-by: Serge Guelton <sguelton@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210430150745.GA1401713@sguelton.remote.csb>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

docs/devel/control-flow-integrity.rst

@@ -39,7 +39,7 @@ later).
 Given the use of LTO, a version of AR that supports LLVM IR is required.
 The easies way of doing this is by selecting the AR provided by LLVM::
 
- AR=llvm-ar-9 CC=clang-9 CXX=lang++-9 /path/to/configure --enable-cfi
+ AR=llvm-ar-9 CC=clang-9 CXX=clang++-9 /path/to/configure --enable-cfi
 
 CFI is enabled on every binary produced.
 
@@ -131,7 +131,7 @@ lld with version 11+.
 In other words, to compile with fuzzing and CFI, clang 11+ is required, and
 lld needs to be used as a linker::
 
- AR=llvm-ar-11 CC=clang-11 CXX=lang++-11 /path/to/configure --enable-cfi \
+ AR=llvm-ar-11 CC=clang-11 CXX=clang++-11 /path/to/configure --enable-cfi \
                            -enable-fuzzing --extra-ldflags="-fuse-ld=lld"
 
 and then, compile the fuzzers as usual.