CUDA: Fix broken test run lines

There was a misisng space between the -march and --cuda-gpu-arch
arguments, so --cuda-gpu-arch wasn't actually being parsed. I'm not
sure what the intent of the sm_10 run lines were, but they error as an
unsupported architecture. Switch these to something else.

Author: arsenm

clang/test/Driver/cuda-flush-denormals-to-zero.cu

@@ -2,10 +2,10 @@
 // -fcuda-flush-denormals-to-zero. This should be translated to
 // -fdenormal-fp-math-f32=preserve-sign
 
-// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell--cuda-gpu-arch=sm_20 -fcuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=FTZ %s
-// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell--cuda-gpu-arch=sm_20 -fno-cuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
-// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell--cuda-gpu-arch=sm_10 -fcuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=FTZ %s
-// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell--cuda-gpu-arch=sm_10 -fno-cuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
+// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=sm_20 -fcuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=FTZ %s
+// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=sm_20 -fno-cuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
+// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=sm_70 -fcuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=FTZ %s
+// RUN: %clang -no-canonical-prefixes -### -target x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=sm_70 -fno-cuda-flush-denormals-to-zero -nocudainc -nocudalib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
 
 // CPUFTZ-NOT: -fdenormal-fp-math