west.yml: Make openisa hal a zephyr_library

Stops leaking long source paths in build directories and makes them
deterministic.

When building samples/hello_world for rv32m1_vega_ri5cy, this changes
the build directories from:

build/
└── zephyr
└── CMakeFiles
    └── zephyr.dir
	└── home
	    └── maureen
		└── zephyrproject
		    └── modules
			└── hal
			    └── openisa
				└── vega_sdk_riscv
				    └── devices
					└── RV32M1
					    └── drivers
						├── fsl_clock.c.obj
						└── fsl_lpuart.c.obj
to:

build/
└── modules
└── openisa
    └── lib..__modules__hal__openisa.a

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>

west.yml

@@ -59,7 +59,7 @@ manifest:
       revision: 00580f43b9d48f2079d611ce12f0fbc78d3040f1
       path: modules/hal/nordic
     - name: hal_openisa
-      revision: 3b54187649cc9b37161d49918f1ad28ff7c7f830
+      revision: 40d049f69c50b58ea20473bee14cf93f518bf262
       path: modules/hal/openisa
     - name: hal_microchip
       revision: aad89bf0531a30dcd6c87e4065f1b973fb31c11f