crypto: fix unsigned conversion of 4-byte RSA publicExponent #6067

Job	Run time
collect-openssl-versions	5s
Build slim tarball	2m 6s
x86_64-darwin: with shared libraries	46m 25s
aarch64-darwin: with shared libraries	24m 9s
aarch64-linux: Cache V8 build	29s
x86_64-linux: with shared libraries	26m 42s
aarch64-linux: with shared openssl_1_1 (1.1.1w)	23m 3s
aarch64-linux: with shared openssl_3_5 (3.5.5)	23m 49s
aarch64-linux: with shared openssl_3_6 (3.6.1)	22m 39s
aarch64-linux: with shared openssl_4_0 (4.0.0)	23m 0s
aarch64-linux: with shared openssl_3 (3.0.19)	23m 48s
	3h 36m 15s

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