refactor(install-engines.sh): Updated readme and refactored to install-engines.sh to run chmod command without any condition

Author: Muhammad Ahmad

packages/benchmark/README.md

@@ -6,6 +6,4 @@ This package just provides a minimalistic ava-like interface to run benchmark te
 Run the command `yarn test` in the `packages/benchmark` folder.
 
 ## Pre-reqs of running `yarn test`
-Run the command `yarn install-engines` in the `packages/benchmark` folder. This command will install the `eshost` and `esvu`. 
-* `esvu` is used to insall the binaries of `v8` and `xs` engines
-* `eshost` is used to configure the binaries of engines
+Run the command `yarn install-engines` to ensure installation of V8 and XS engines in $HOME/.esvu for this package's `eshost`.

packages/benchmark/install-engines.sh

@@ -29,14 +29,8 @@ if [ -n "$INSTALL_STATUS_XS" ] || [ -n "$INSTALL_STATUS_V8" ]; then
 fi
 
 
-## Making engine binaries executable (if not already) ##
-if [ ! -x "$HOME/.esvu/bin/xs" ]; then
-    chmod +x "$HOME/.esvu/bin/xs"
-fi
-
-if [ ! -x "$HOME/.esvu/bin/v8" ]; then
-    chmod +x "$HOME/.esvu/bin/v8"
-fi
+## Making engine binaries executable ##
+chmod +x "$HOME/.esvu/bin/xs" "$HOME/.esvu/bin/v8"
 
 
 ## Adding engines to eshost (if not already) ##