Use -match instead of -eq

Since the use of quotes in /etc/os-release is inconsistent across
distributions, we have to match instead of exactly compare.

build.psm1

@@ -397,12 +397,12 @@ function Start-PSBootstrap {
         # Install dependencies for Linux and OS X
         if ($IsLinux) {
             precheck 'curl' "Bootstrap dependency 'curl' not found in PATH, please install!" > $null
-            if ($LinuxInfo.ID -eq 'ubuntu' -and $LinuxInfo.Version -eq '"14.04"') {
+            if ($LinuxInfo.ID -match 'ubuntu' -and $LinuxInfo.Version -match '14.04') {
                 # Install ours and .NET's dependencies
                 sudo apt-get update -qq
                 sudo apt-get install -y -qq make g++ cmake libc6 libgcc1 libstdc++6 libcurl3 libgssapi-krb5-2 libicu52 liblldb-3.6 liblttng-ust0 libssl1.0.0 libunwind8 libuuid1 zlib1g clang-3.5
-            } elseif ($LinuxInfo.ID -eq 'centos' -and $LinuxInfo.Version -eq '"7"') {
                 sudo apt-get install -y -q make gcc cmake glibc libgcc libstdc++ libcurl krb5-libs libicu lldb openssl-libs libunwind libuuid zlib clang
+            } elseif ($LinuxInfo.ID -match 'centos' -and $LinuxInfo.Version -match '7') {
             } else {
                 Write-Warning "This script only supports Ubuntu 14.04 and CentOS 7, you must install dependencies manually!"
             }