Split a file to work around Visual Studio's limit on the length of string literals

plugins/amoeba/platforms/cuda/src/AmoebaCudaKernels.cpp

@@ -1898,25 +1898,30 @@ void CudaCalcAmoebaGeneralizedKirkwoodForceKernel::initialize(const System& syst
     forceSource << CudaKernelSources::vectorOps;
     forceSource << CudaAmoebaKernelSources::amoebaGk;
     forceSource << "#define F1\n";
-    forceSource << CudaAmoebaKernelSources::gkPairForce;
+    forceSource << CudaAmoebaKernelSources::gkPairForce1;
+    forceSource << CudaAmoebaKernelSources::gkPairForce2;
     forceSource << CudaAmoebaKernelSources::gkEDiffPairForce;
     forceSource << "#undef F1\n";
     forceSource << "#define F2\n";
-    forceSource << CudaAmoebaKernelSources::gkPairForce;
+    forceSource << CudaAmoebaKernelSources::gkPairForce1;
+    forceSource << CudaAmoebaKernelSources::gkPairForce2;
     forceSource << "#undef F2\n";
     forceSource << "#define T1\n";
-    forceSource << CudaAmoebaKernelSources::gkPairForce;
+    forceSource << CudaAmoebaKernelSources::gkPairForce1;
+    forceSource << CudaAmoebaKernelSources::gkPairForce2;
     forceSource << CudaAmoebaKernelSources::gkEDiffPairForce;
     forceSource << "#undef T1\n";
     forceSource << "#define T2\n";
-    forceSource << CudaAmoebaKernelSources::gkPairForce;
+    forceSource << CudaAmoebaKernelSources::gkPairForce1;
+    forceSource << CudaAmoebaKernelSources::gkPairForce2;
     forceSource << "#undef T2\n";
     forceSource << "#define T3\n";
     forceSource << CudaAmoebaKernelSources::gkEDiffPairForce;
     forceSource << "#undef T3\n";
     forceSource << "#define B1\n";
     forceSource << "#define B2\n";
-    forceSource << CudaAmoebaKernelSources::gkPairForce;
+    forceSource << CudaAmoebaKernelSources::gkPairForce1;
+    forceSource << CudaAmoebaKernelSources::gkPairForce2;
     CUmodule module = cu.createModule(forceSource.str(), defines);
     computeBornSumKernel = cu.getKernel(module, "computeBornSum");
     reduceBornSumKernel = cu.getKernel(module, "reduceBornSum");