fix gcc snapshot, clang trunk

etc/config/c++.amazon.properties

@@ -46,7 +46,7 @@ compiler.g62.exe=/opt/compiler-explorer/gcc-6.2.0/bin/g++
 compiler.g62.name=x86-64 gcc 6.2
 compiler.g63.exe=/opt/compiler-explorer/gcc-6.3.0/bin/g++
 compiler.g63.name=x86-64 gcc 6.3
-compiler.g7snapshot.exe= /opt/compiler-explorer/gcc-snapshot/bin/g++
+compiler.g7snapshot.exe= /opt/compiler-explorer/gcc-7-snapshot/bin/g++
 compiler.g7snapshot.name=x86-64 gcc 7 (snapshot)
 
 # Clang for x86
@@ -73,7 +73,7 @@ compiler.clang390.exe=/opt/compiler-explorer/clang+llvm-3.9.0-x86_64-linux-gnu-u
 compiler.clang390.name=x86-64 clang 3.9.0
 compiler.clang391.exe=/opt/compiler-explorer/clang-3.9.1/bin/clang++
 compiler.clang391.name=x86-64 clang 3.9.1
-compiler.clang_trunk.exe=/opt/compiler-explorer/clang-3.9.1/bin/clang++
+compiler.clang_trunk.exe=/opt/compiler-explorer/clang-trunk/bin/clang++
 compiler.clang_trunk.name=x86-64 clang (trunk)
 
 # icc for x86