Update build script

Author: frabert

scripts/build.sh

@@ -18,8 +18,8 @@ DOWNLOAD_DIR="$( cd "$( dirname "${SRC_DIR}" )" && pwd )/lifting-bits-downloads"
 CURR_DIR=$( pwd )
 BUILD_DIR="${CURR_DIR}/rellic-build"
 INSTALL_DIR=/usr/local
-LLVM_VERSION=llvm-14
-CXX_COMMON_VERSION=v0.2.10
+LLVM_VERSION=llvm-15
+CXX_COMMON_VERSION=v0.2.11
 OS_VERSION=unknown
 ARCH_VERSION=unknown
 BUILD_FLAGS=
@@ -326,6 +326,10 @@ function GetLLVMVersion
       LLVM_VERSION=llvm-14
       return 0
     ;;
+    15)
+      LLVM_VERSION=llvm-15
+      return 0
+    ;;
     *)
       # unknown option
       echo "[x] Unknown or unsupported LLVM version ${1}. You may be able to manually build it with cxx-common."