[Makefile] Update to latest version of CMAKE
@@ -26,7 +26,7 @@ ISA_SIM_INSTALL_DIR ?= ${INSTALL_DIR}/riscv-isa-sim
LLVM_INSTALL_DIR ?= ${INSTALL_DIR}/llvm
HALIDE_INSTALL_DIR ?= ${INSTALL_DIR}/halide
-CMAKE ?= cmake-3.7.1
+CMAKE ?= cmake-3.18.1
# CC and CXX are Makefile default variables that are always defined in a Makefile. Hence, overwrite
# the variable if it is only defined by the Makefile (its origin in the Makefile's default).
ifeq ($(origin CC),default)
