Postgres lambda functions implemented

src/.gitignore

src/.idea/misc.xml

src/.idea/modules.xml

src/.idea/src.iml

src/.idea/workspace.xml

src/Makefile

src/backend/executor/execExpr.c

src/backend/executor/execExprInterp.c

src/backend/executor/execExprInterp.ll

src/backend/executor/execProcnode.c

src/backend/executor/execSRF.c

src/backend/executor/execUtils.c

src/backend/executor/nodeSubplan.c

src/backend/jit/jit.c

src/backend/jit/llvm/Makefile

src/backend/jit/llvm/llvmjit.c

src/backend/jit/llvm/llvmjit_deform.c

src/backend/jit/llvm/llvmjit_expr.c

src/backend/jit/llvm/llvmjit_inline.cpp

src/backend/jit/llvm/llvmjit_lambda.cpp