Drop `-DCLR_CMAKE_TARGET_ARCH_AMD64=1` cmake option from README

Now it's not necessary to specify it for Ubuntu build.

diff --git a/README.md b/README.md
index e70c9568e4f67f1e8106c66f690d89002a6edfa0..9bdd598e0aaf3609fd0d96f544369bbdd914565f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The debugger provides GDB/MI interface and allows to debug .NET apps using ICorD
    mkdir build
    cd build
 
-   CC=clang CXX=clang++ cmake ../ -DCMAKE_INSTALL_PREFIX=$CORECLR_OVERLAY -DCLR_DIR=$CORECLR_PATH -DCLR_BIN_DIR=$CORECLR_BIN -DCLR_CMAKE_TARGET_ARCH_AMD64=1 -DCORECLR_SET_RPATH=\$ORIGIN
+   CC=clang CXX=clang++ cmake -DCMAKE_INSTALL_PREFIX=$CORECLR_OVERLAY -DCLR_DIR=$CORECLR_PATH -DCLR_BIN_DIR=$CORECLR_BIN -DCORECLR_SET_RPATH=\$ORIGIN ../
    make -j
    make install
    ```