update llvm version in INSTALL.md
@@ -21,8 +21,8 @@ is to build and install everything:
```shell
sudo apt-get update
sudo apt-get install -y build-essential python3-dev automake cmake git flex bison libglib2.0-dev libpixman-1-dev python3-setuptools
-# try to install llvm 11 and install the distro default if that fails
-sudo apt-get install -y lld-11 llvm-11 llvm-11-dev clang-11 || sudo apt-get install -y lld llvm llvm-dev clang
+# try to install llvm 12 and install the distro default if that fails
+sudo apt-get install -y lld-12 llvm-12 llvm-12-dev clang-12 || sudo apt-get install -y lld llvm llvm-dev clang
sudo apt-get install -y gcc-$(gcc --version|head -n1|sed 's/\..*//'|sed 's/.* //')-plugin-dev libstdc++-$(gcc --version|head -n1|sed 's/\..*//'|sed 's/.* //')-dev
sudo apt-get install -y ninja-build # for QEMU mode
git clone https://github.com/AFLplusplus/AFLplusplus
