Disable shared (-buildmode=shared)

[..]
+ go install -buildmode=shared -v -x std
-buildmode=shared not supported on linux/riscv64
[..]

Attempt it again after bootstrap is done.

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

golang.spec

@@ -71,7 +71,7 @@
 %endif
 
 # Build golang shared objects for stdlib
-%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64 riscv64
+%ifarch %{ix86} x86_64 ppc64le %{arm} aarch64
 %global shared 1
 %else
 %global shared 0